Not only does he execute his performances the way he does, he also composes them himself.

Everything you hear in this video is his, including the drums, the bass and other harmonies which he pre-programmed. He's doing the lead in this specific performance. He changes patches [instruments] by using a foot pedal. The realistic eletcric guitar leads are enhanced by using the modulation wheel located at the far left side of the keyboiard [watch closely his left hand]. It allows him to give a lot of expression to the sound those guitar solos by slightly changing the pitch of a note and adding vibrato to it.

Notice also the variety of music styles he goes through during the performance.